Merriam-Webster Collegiate Dictionary - revolve

 verb  (~d; revolving)  Etymology: Middle English, from Latin ~re to roll back, cause to return, from re- + volvere to roll — more at voluble  Date: 15th century  transitive verb  1. to turn over at length in the mind ; ponder ~ a scheme  2.  a. obsolete to cause to go round in an orbit  b. rotate 1  intransitive verb  1. recur  2.  a. to ponder something  b. to remain under consideration ideas ~d in his mind  3.  a. to move in a curved path round a center or axis  b. to turn or roll round on an axis  4. to have or come to a specified focus ; center — usually used with around the dispute ~d around wages  • revolvable adjective